We will be relying on people installing gradle themselves. The documentation
on help.exercism.io has been updated with instructions for both Windows and Mac.
A straight port of the Ruby tests. The example implementation
uses Joda Time which is generally considered a saner date/time
library than what is built in to Java.
Gradle can be run directly on Mac/Linux/Windows and
auto-download dependencies (much like sbt for Scala),
as well as simplify IDE integration.
Add appropriate .gitignore for this sub-tree.
For developers, to add a new exercism:
cp -r _template new-exercism
# create test in new-exercism/src/test/java/SampleTest.java
git add new-exercism
Users will be able to just run "./gradlew check" to run tests.